MySQL无法在from子句中为子查询创建视图

我正在尝试进行一个查询，该查询将显示前10个系统，“其他”显示为第11行。我提出了联合询问。我发现我构建的查询会为每个不在Top10中的系统名返回“Other”记录，所以我在select中选择了select，将所有“Other”记录相加。这使我找到了错误代码1349。有人能帮我重新安排这个问题吗

create view QueryView as (Select 
System, Cast(Sum(Duration) as unsigned) AS 'Sum'
From
tbl_Events
    INNER JOIN
(trans_GU, tbl_G, trans_GM) ON (trans_GU.Unit_ID = tbl_Events.Unit_ID
    AND trans_GU.GIB_SN = tbl_G.SN
    AND tbl_G.EQUIPCODE = trans_GM.EQUIPCODE
    AND tbl_G.GEN_MODEL = trans_GM.GEN_MODEL)
WHERE
trans_GM.ProductLine = 'fleet'
GROUP BY System
Order By Sum desc
Limit 10) 
Union 
(Select 'Other' As System, Cast(Sum(a.`Sum`) As Unsigned) As 'Sum' FROM (Select 
'Other' As System,
Sum(Duration) AS 'Sum'
FROM    tbl_Events
    INNER JOIN
(trans_GU, tbl_G, trans_GM) ON (trans_GU.Unit_ID = tbl_Events.Unit_ID
    AND trans_GU.GIB_SN = tbl_G.SN
    AND tbl_G.EQUIPCODE = trans_GM.EQUIPCODE
    AND tbl_G.GEN_MODEL = trans_GM.GEN_MODEL)
WHERE
trans_GM.ProductLine = 'fleet'
GROUP BY System
Order By Sum desc
Limit 10,99999999) As a);

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对。MySQL不支持

from

子句中的子查询。您可以将查询的第二部分重写为，而不使用子查询：

(Select 'Other', cast(Sum(Duration) as unisgned) AS "Sum"
 FROM  tbl_Events INNER JOIN
      (trans_GU, tbl_G, trans_GM)
      ON (trans_GU.Unit_ID = tbl_Events.Unit_ID
          AND trans_GU.GIB_SN = tbl_G.SN
          AND tbl_G.EQUIPCODE = trans_GM.EQUIPCODE
          AND tbl_G.GEN_MODEL = trans_GM.GEN_MODEL)
 WHERE trans_GM.ProductLine = 'fleet'
 From tbl_RAM
 GROUP BY System
 Order By Sum desc
 Limit 10,99999999
) 

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谢谢你的回答，我尝试了这个，但是我返回了不止一行。这就是我进行子查询的原因。